In Toronto, the 416 and 647 area codes will be augmented by a new prefix: 437.

And within the mostly suburban domain of 905 and 289, the new three-digit face on the block will be 365.

Similar area-code additions have recently taken effect in northern Ontario, Quebec and Manitoba.

The changes were announced Wednesday by the Telecommunications Alliance, a network of service providers.

With the approval of the Canadian Radio-Television and Telecommunications Commission, they will be implemented late next month.

Similar expansions have been under way in other parts of Canada for several months.

Story continues below advertisement

Story continues below advertisement

In Québec, the new 873 area code was added to the 819 region in September.

In Manitoba, effective November, a new 431 area code was established alongside 204.

Other earlier additions included: 249 in the 705 area in northern Ontario; 579 in the 450 area in Québec; 343 in the 613 area in Ontario; 581 in the 418 area in Québec; 438 in the 514 area in Montreal; 587 in the 403 and 780 areas in Alberta; 226 in the 519 area in Ontario; and 778 in the 604 and 250 areas of British Columbia.

The Globe invites you to share your views. Please stay on topic and be respectful to everyone. For more information on our commenting policies and how our community-based moderation works, please read our Community Guidelines and our Terms and Conditions.

We’ve made some technical updates to our commenting software. If you are experiencing any issues posting comments, simply log out and log back in.